an intervention order is only as good as the paper it's written on if you don't report what has been happening. yes, you can't prove it's him - but if you don't report it, and have the police do what is within their power, the little snot is going to know it's not being enforced, and is going to keep doing it. if it turns out to NOT be him, you may find out what other little snot is annoying you. it doesn't matter if you don't think it's worth annoying the police about - you went to the effort of getting the intervention order, you HAVE TO report it, otherwise that whole exercise was a waste of time - and HE KNOWS IT!